Originally Posted by
alp67
So for a 3.5-4 hour layover u obviously do not leave the airport anyway, therefore u won't need a visa at all as long as u stay airside / in Transit AND (very important, too!) <24 hrs.
I do have a couple of upcoming MR with turns in PEK as well and found this information in various forum discussions, so please do tell me if I'm wrong.
You're wrong, you need to be going on to another country to be eligible for the visa waiver program. USA-PEK-USA does not meet those requirements.